Trim and treat with fungicide to combat root decay effectively. After that, these plants can survive in some periods of. Red hot poker plant care involves regular watering until these plants are established. Spotting the. red hot poker plant poisonous. A plant I like, but for the moment is missing from my garden, is red hot poker (Kniphofia uvaria). Enhance soil drainage and adjust watering to prevent future rot. They aren't fussy about humidity. Red hot pokers do best in moderate temperatures, between 60ºF and 90ºF. I like the plant - it should do well in my garden and. . Unless soil is of very. All about Red Hot Poker plants, aka Torch Lilies. Learn how to choose a variety of this unusual, flowering perennial for your growing conditions. Fertilizer.